Machine for manufacturing boots and shoes



Nov. 26, 1929. H. WALTHER MACHINE FOR MANUFACTURING BOOTS AND SHOES Filed March 50. 1927 Patented Nov. 26., 1929 UNITED STATES PATENT OFFICE MACHINE FOR MANUFACTURING BOOTS AND SHOES Application filed March 30, 1927, Serial No. 179,680, and in Germany July 2, 1926.

This invention relatesto a machine for manufacturing boots and shoes. More particularly the invention relates to the art of attaching welts to lasted shoes.

v Hitherto these leather parts are generally connected by metallic fastenings or by sewing threads. The metallic-fastenings, as staples and tacks, are driven by simple machines, but they impair the flexibility of the shoes if they are closely driven in a row to obtain a tight joint. On the other hand sewn shoes are more flexible, but the sewing machines are complicated and delicate.

According to the present'invention metal he fastenings are used in combination with a fastening thread. The metallic fastenings connect the leather parts and fasten at the same time a continuous thread as to bridge the intervals between the single metallic fastenings. The thread-bridges between the sin gle metallic fastenings act in the same manner as the thread parts between the single stitches of a seam, they give a tight jointand a flexible connection.

It is an essential feature of the present invention that a machine is devised; performing the said combined fastening and that this machine does not much differ from a common nailing or sta ling machine. A stapling machine is pre erably used for the p .rpose set forth inasmuch as the fastening thread can easily be accommodated between the prongs of the staples. 7

Other objects and features of the invention will be apparent from the following detailed description and will be pointed out in the claim.

The drawing shows as much of a stapling machine as is deemed necessary for an understanding of the present invention. For a complete disclosure of the stapling machine reference may be had to Letters Patent No. 447,681 and 571,227 granted to Prenzel.

Fig. 1 is a front view and i Fig. 2 a side view of the operative parts of the machine as far asthey are concerned with the present invention. 1 1

Fig. 3 shows the bottom of a lasted shoe with a welt attached thereto by the new machine.

Fig. 4 to 6 are different views of the nozzle partly in section.

The nozzle 70 for guiding the driver a and the staples to be driven is fastened in the known manner to the machine-head p carry- 65 ing by means of the detachable bent arm 6 I the channel 0 for guiding the welt f and the finger d for guiding the thread 9.

The shoe is held against the nozzle is and the guiding roll it while the welt lies upon the said roll.

When the machine is running the toothed roller 0 cooperates with the guiding roll h and transports the shoe and the fastening of the welt f by means of the staples i and the thread g is automatically effected;

. For a proper guiding of the thread the bent arm 6 has a guiding bore 6'. The nozzle is too has for the same purpose the bore Z and the notch n, as best seen in Fig. 5. The bore 7 Z and the notch 09. lie in a direction parallel to the crown of the staple. The prongs of the staples are outwardly beveled or pointed sothat they take like a claw hold of the I thread and guide it against the crown of the staple. Hereby every staple in'being driven home bends the thread and deflects it from the direction of the transport-of the shoe.

The thread which is tensioned like in a sewing machine becomes additionally ten- 30 sioned by the said deflection. The vertical groove m is provided to prevent the shearing off the thread by the downwardly moving staple-driver.

The row of the fastenings driven and the thread lie flat upon the welt so that the outsole can be brought into intimate contact with the welt.

What I claim is:

In a machine for attaching welts to lasted shoes by staples, the'combinat ion with a noz- "zle for guiding the staples to be driven, of

means for positioning a continuous thread between the prongs of the staples, guiding a welt across the path of the staples, and trans- I porting the shoe.

In testimony whereof I aflix my signature.

HEINRICH WALTHER. 

